Analysis of a Stabilized CNLF Method with Fast Slow Wave Splittings for Flow Problems

Nan Jiang, Hoang Tran

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In this work, we study Crank-Nicolson leap-frog (CNLF) methods with fast-slow wave splittings for Navier-Stokes equations (NSE) with a rotation/Coriolis force term, which is a simplification of geophysical flows. We propose a new stabilized CNLF method where the added stabilization completely removes the method's CFL time step condition. A comprehensive stability and error analysis is given. We also prove that for Oseen equations with the rotation term, the unstable mode (for which un+1 + un-1 ≡ 0) of CNLF is asymptotically stable. Numerical results are provided to verify the stability and the convergence of the methods.

Original languageEnglish
Pages (from-to)307-330
Number of pages24
JournalComputational Methods in Applied Mathematics
Volume15
Issue number3
DOIs
StatePublished - Jul 1 2015

Funding

FundersFunder number
Air Force Office of Scientific ResearchFA 9550-12-1-0191
National Science FoundationDMS 1216465
National Science Foundation1216465

    Keywords

    • CNLF
    • Fast-Slow Wave Splitting
    • NSE
    • Stabilization

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